drm/amd/display: parse umc_info or vram_info based on ASIC

An upstream bug report suggests that there are production dGPUs that are
older than DCN401 but still have a umc_info in VBIOS tables with the
same version as expected for a DCN401 product. Hence, reading this
tables should be guarded with a version check.

Closes: https://gitlab.freedesktop.org/drm/amd/-/issues/3678
Reviewed-by: Dillon Varone <[email protected]>
Signed-off-by: Aurabindo Pillai <[email protected]>
Signed-off-by: Zaeem Mohamed <[email protected]>
Tested-by: Daniel Wheeler <[email protected]>
Signed-off-by: Alex Deucher <[email protected]>
(cherry picked from commit 2551b4a)
Fixes: 00c3911 ("drm/amd/display: Add misc DC changes for DCN401")
Cc: [email protected] # 6.11.x

Author: Aurabindo Pillai

drivers/gpu/drm/amd/display/dc/bios/bios_parser2.c

@@ -3127,7 +3127,9 @@ static enum bp_result bios_parser_get_vram_info(
 	struct atom_data_revision revision;
 
 	// vram info moved to umc_info for DCN4x
-	if (info && DATA_TABLES(umc_info)) {
+	if (dcb->ctx->dce_version >= DCN_VERSION_4_01 &&
+		dcb->ctx->dce_version < DCN_VERSION_MAX &&
+		info && DATA_TABLES(umc_info)) {
 		header = GET_IMAGE(struct atom_common_table_header,
 					DATA_TABLES(umc_info));